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Posted: 2/9/2012 9:14:33 AM EDT
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I have my AR sigted in at 50 yards open sights.
I put in my .22 CMMG conversion and i'm getting impact about 3.5 to 4 inches lower then the .223 bullets. Is this normal at this distance? |
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Totally Normal.
You have a rifle sighted for a high power cartridge with high velocity. Then you shoot a very low power round through and expect no change. I have seen aim / zero changes from a rifle sighted with M855 then using wolf or PMC at 100yrds. They were about 1in lower. |
| And FWIW, I wouldn't expect a .22 conversion kit to group that well through a 1/9 barrel as I susect the M&P is. Even worse with a 1/8 or 1/7. 6" at 65 yards probably isn't out of the norm. If you cruise into the rimfire area there are guys that have done a lot of monkeying with the conversions to see what kind of groups they can get. Most end up with dedicated uppers or 1/12 barrels for the .22's |
| I have looked at the conversion forums. I was just hoping for a little better groups, say 3 in @ 60 yards. But POI was surprising. A 22lr doesn't have that kind of drop on it's own, it must be the combination of 1/8 twist and a conversion. Maybe the velocity is low do to the conversion and gas tube let gas to escape, that could cause excessive drop. |
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